What is the folder-shaped icon?
In order to use this function, a user must install (add) a chrome extension program named "Local Explorer." It can be downloaded from the following URL:
https://chrome.google.com/webstore/detail/local-explorer-file-manag/eokekhgpaakbkfkmjjcbffibkencdfkl
After installing the program, a user needs to set the default as follows:
A user can enter the path by clicking the icon; as the folder-shaped icon is changed to a clickable icon once a path is entered, it needs to open the text area by pressing the [Enter] key in order to revise the path.
Please see below the video showing how to enter the path.